简单的C语言动画程序

#include <math.h>

#include <stdio.h>

#include <graphics.h>

#include <dos.h>

#define pi 3.1415926535

double ca3mm1(double m1,double m2);

double ca3fm1(double cosine,double sine);

double ca5fm2(double a6m,double a5m,double a4m,double a4f,int shang);

double ca6fm2(double a4m ,double a4f,double a5m , double a5f);

char inbox(int x,int y,int x1,int y1);